Hi @lauzura -
I haven’t had to process SoilGrids in a while, and looking at the latest version (2.0) it appears that some of the properties that were provided in the previous version aren’t there yet, including soil depth and available water content. But you can try the previous version (1.7) - the layers are here and a FAQ that describes each layer is here.
For AWC, it looks like their units are in percent, so you’d just need to convert percent to a fraction to have the units required by InVEST. The trick is that they provide the AWC layer at multiple depths, so you need to process them to get a single value, which I haven’t needed to do. The FAQ does provide a link to this paper, which gives an equation that can be used for general averaging across horizons.
@jandrewjohnson, I think you went through the process of processing Soil Grids to a single PAWC map - can you give us any tips? This topic has come up before, so it would be really useful to have this info as a searchable resource here - Thanks!
~ Stacie